secp256k1/schnorr: Add tests for R and S methods. #6238

	name: Build and Test
	on: [push, pull_request]
	permissions:
	contents: read

	jobs:
	build:
	name: Go CI
	runs-on: ubuntu-latest
	strategy:
	matrix:
	go: ["1.22", "1.23"]
	steps:
	- name: Check out source
	uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
	- name: Set up Go
	uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32 # v5.0.2
	with:
	go-version: ${{ matrix.go }}
	- name: Use lint cache
	uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4.0.2
	with:
	path: \|
	~/.cache/golangci-lint
	key: go-lint-${{ matrix.go }}-${{ hashFiles('./go.sum') }}
	restore-keys: go-lint-${{ matrix.go }}
	- name: Stablilize testdata timestamps
	run: \|
	bash ./.github/stablilize_testdata_timestamps.sh "${{ github.workspace }}"
	- name: Install Linters
	run: "go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.60.1"
	- name: Build
	run: go build ./...
	- name: Test
	run: \|
	sh ./run_tests.sh

Provide feedback